This ability's description is a little misleading until you actually use it and can see it in action.
Blistering cold places a four-round team-based debuff on the ground of the enemy team, affecting the active pet. Because of this it does not have to hit the target; the target may be unhittable due to a launch / burrow / evasion type ability, and this ability will still fire off.
Each round the active pet will be inflicted by a Frostbite debuff (this debuff can be dodged / blocked by special abilities.) Every additional round another, additional Frostbite debuff debuff is applied to the active pet. And as long as the Blistering Cold ability remains up and active (you can keep casting it every fifth round) the Frostbite debuffs will refresh their duration to two rounds. They never wear off as long as Blistering Cold is up; as long as the active pet remains active he will continue to acquire Frostbite debuffs. I've had as many as twelve stacks on an enemy pet, just to test the ability. Each stack does a small amount of elemental damage, but it adds up.
EDIT: As of patch 5.2, Blistering Cold will now only apply a maximum of four stacks, making this marginally useful ability much less so.
And here is the catch: if the active pet swaps out, all Frostbite stacks are wiped. Blistering Cold remains up, and will begin applying Frostbite stacks to the front pet. This could encourage opposing players to swap out their pets to minimze damage, which could be useful.
The ability is completely negated by any type of shell-based defense. Using it against pets with thorns is probabaly suicidal.
Any ability that adds damage per attack will pair well with Blistering Cold's Frostbite damage, or Plagued Blood that returns health to the caster who inflicts damage.
It is an interesting ability, but only useful when you are fighting a long-drawn out battle against defensive / healing types of pets. Could be handy if it forces players to swap their pets against you. Not as useful in shorter fights against pets.
makes each turn last foreverrrrr.
This is super useful for any Legendary pet battle since they have no other pet to switch to. Couple a double damage debuff with it (like Howl, Swarm, or Hunting Party) and/or a debuff that is a flat damage increase (like Black Claw) and you've got a way to deal large amounts of damage multiple times a turn in such a way it doesn't trigger the Legendary big hit protection.
The most powerful aspect of this is its obscurity & your opponents ignorance. Based on experience, few people switch when you use it. Even if they have like 6 stacks of it on them.
A Pet Battler's Guide to: Defeating the Celestial Tournament
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